Plural bore to single bore ion transfer tube

H - Electricity – 01 – J

Patent

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Details

H01J 49/10 (2006.01)

Patent

CA 2671542

An ion source includes an ion transfer tube having two segments for transporting a sample fluid containing ions between a first chamber and a second chamber maintained at a reduced pressure relative to the first chamber. A first segment may include a plurality of channels and heat conductive walls forming the plurality of channels. The plurality of channels and walls forming the channels promote efficient convective heat transfer to the sample fluid, thereby enabling operation at relatively high sample fluid flow rates, resulting in an increase in the number of ions that may be delivered to a mass analyzer. A second segment forms a single common channel that receives a plurality of sample streams and enables them to combine into a single ion stream that may be introduced as a single gas stream expansion into the second chamber.

L'invention concerne une source d'ion comprenant un tube de transfert d'ions ayant deux segments pour transporter un fluide échantillon contenant des ions entre une première chambre et une seconde chambre maintenue à une pression réduite par rapport à la première chambre. Un premier segment peut comprendre une pluralité de canaux et de parois conductrices thermiques formant la pluralité de canaux. La pluralité de canaux et de parois formant les canaux favorise un transfert de chaleur par convexion efficace vers le fluide échantillon, permettant ainsi un fonctionnement à des débits de fluide échantillon relativement élevés, conduisant à une augmentation du nombre d'ions qui peut être délivré à un analyseur de masse. Un second segment forme un canal commun unique qui reçoit une pluralité de courants d'échantillon et leur permet de se combiner en un courant ionique unique qui peut être introduit sous forme de dilatation de courant de gaz unique dans la seconde chambre.

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